A notch filter based on an index confined photonic band gap waveguide is proposed. The dropping of an electromagnetic wave having a specific wavelength is obtained by opportunely designing a periodically corrugated overlay. The selective filtering properties of the proposed structure are identified by using a computer code based on the bidirectional beam propagation method with the aid of the method of lines. The optimized design of a notch filter, characterized by a full-width half-maximum (FWHM) bandwidth of 2 nm, is given. The tunability is reached by exploiting the electroclinic effect of smectic-A* liquid crystals.
|Autori interni:||CALO', Giovanna|
DE SARIO, Marco
|Titolo:||Tunability of photonic band gap notch filters|
|Rivista:||IEEE TRANSACTIONS ON NANOTECHNOLOGY|
|Data di pubblicazione:||2008|
|Digital Object Identifier (DOI):||10.1109/TNANO.2008.917848|
|Appare nelle tipologie:||1.1 Articolo in rivista|